Adjustable work-support



9 I I H @0 -3 54 W N. SCHWAGEL.

ADJUSTABLE WORK SUPPORT.

APPLICATION FILED JULY 21.1919.

1,366,962. Patented Feb. 1, 1921.

2 SHEETS-SHEET I.

N. SCHWAGEL.

ADJUSTABLE WORK SUPPORT. APPLICATiON FILED JULY 21.1919.

1,366,962. Patented Feb. 1,1921.

2 SHEETS-SHEET 2.

4% z w MIMI!!! uueml oz UNITED STATES NICHOLAS SCHWAGEL, OF DAYTON, OHIO.

ADJUSTABLE WORK-SUPPORT.

To all whom it may concern:

Be it known that I, NICHOLAS SOHWAGEL, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Adjustable Work-Supports, of which the following is a specification.

My invention relates to an adjustable work holder or mounting particularly intended as an attachment for grinders to enable either circular or radius grinding, but is also applicable to other machines for operations of similar character, as for instance milling operations. 7 i' The object of. the invention-is to simplify the structure as well as the means and mode I of operation, whereby they will not only be cheapened in construction but will be more eflicient in use, uniform and accurate in. operation, easily controlled and adjusted an unlikely to get out of repair.

A further object of the invention is to provide for such a device'a pivotal or oscil-.. latory base or carrier, and a form of pivotal.

bearing therefor which may be easily and readily adjusted to compensate for wear, and to maintain a predetermined degree of frictional resistance.

A further object of the invention is to provide adjustable means for mounting the work, or'in some cases the grinder or other tool, to afford an approximately universal adjustment of the work and the tool,'and to provide improved means for interconnecting the adjustable parts.

lVith the above primary and other incidental objects in view as will more fully appear in the specification, the invention consists of the features of construction, the parts and combinations thereof and the mode of operation or their equivalents, as

hereinafter described and set forth in the claims. h

Referring to the drawings Figure 1 is a perspective view of the assembled mounting embodying a rotary spindle which may carry either the work or the operating elements. Fig. 2 is a side elevation, partly in section, of the carrier or mounting upon which is shown a machinists vise which may be utilized to hold work of suchcharacter. Fig. 3 is a top plan view of the construction shown in Fig. 1. Fig. 4 is an end elevation of the base and carrier members. Fig. 5 is a detail sectional view illustrating the method of adsur acute in relation with the perpendicular.

Specification or Letters Patent. Patented Feb. 1, 1921. Application filed July 21, 1919. Serial No. 312,123.

justably connecting the work or tool holder or carrier upon the oscillatory support.

Like parts are indicated by similar characters of reference throughout the several views. j I

In constructing the device there is e1nployed a main base 1 adapted to be fixedly secured upon the bed or platen of a grinder, milling machine or other supporting table, which base carries adj acent'to one end thereof an upright tapered stud 2. The stud 2 is of quite large diameter compared with its height, thereby giving an extensive bearing ace. The taper of the stud 2 is rather Mounted for lateral swinging movement in relation with the base 1 is an oscillatory carrier or support 3, having at one end thereof a fixedly mounted cap {1, the interior of which is tapered to agree with the stud 2. The stud 2 and cap 4: have beenshown in the drawings as screw threaded into the memb'ers 1 and 3 respectively, but-it is to he understood that any other method of attaclr mentmay be employed. The tapered hear- .ing of the cap l upon the stud 2 affords a tight joint eliminating play, and maintains the center of oscillation of the carrier or support 3, constant. By the vertical adjustment of the cap 4 upon the stud 2, the degree of frictional engagement of the members may be regulated and the maybe adjusted to compensate for wear. lo enable the ad justment of these parts, While permitting the relative oscillation of the base 1 and carrier or support 3 without undue resistance or friction, there are provided intermediate the top of the stud 2 and the end of the cap 4 a series of hearing balls 5 which may be carried in a suitable ball cage or retainer. Upon the top of the balls 5 rests a hardened steel disk 6 engaged with the cap at to prevent relative rotation by means of a pin or stud 7 engaging a notch in the periphery of upon the disk 6 is an adjusting stud 8. It,

will thus be seen that the weight of the oscillator mounting and arts carried thereby is sustained by the bearing balls 5 which an gage the terminal face of the stud 2, while by the adjustment of the stud 8 in the head- -of the cap l, the cap may be varied vertically in relationwith the stud 2 to regulate the degree of frictional contact or engagement of the tapered peripheral face of the llil stud 2l with-in said' cap. 'As the bearing may wear an'd develop aslight degree of looseness or instability, the adjusting stud 8 is unscrewed, thus lowering the cap 4: upon the 5 tapered stud to compensate for wear or take up any play of the bearing. Thus the bear- 7 ing may be maintained in a close working fit yet be freely movable to and fro upon the bearing balls 5. The carrier or support 3 is ,v 10 thus capable of free oscillation to and fro about the stud 2. To facilitate the oscillation of the carrier or support 3, it is profvided with an operating handle 9. Provided .in the upperface of the oscillatory carrier 15, or support 3 is a transverse, dovetailed or 4 undercut slot 10. As shown in Figs. 1 and 3, there is mounted upon the carrier a spindle head 11, having mounted therein a rotary shaft or spindle 12, carrying at a me- ZO dial position a drive pulley 13. The ends of the shaft or spindle are fitted with suitable collars or sleeves 14 and adjusting nuts 15, by which any circular work having central openings may be secured upon the spindle or shaft. Work of this character may comprise milling cutters or various disks or rings which are to be surfaced or ground accurately, either upon circular lines concentric with the center or upon arouate lines,

by which the .periphery of such disks or ,.v fmengbers are given rounded edges or corners which is ordinarily known as radius grin d- -ing. The spindle head 11 is adjustable to various positions upon the carrier or sup- I port 3-, and to this end the bottom surface of the spindle head 11' is provided with a longitudinally disposed, dovetailed or undercut slot 16, and with a clamp bolt 17 projecting through a slot 18 in the base or bottom of the spindle head 11, which stud if carries beneath the head 11 two oppositely 3 arranged tapered or conical disks 19 and 20; engaging in the beveled slot 16 of the spindle head and the transverse beveled slot 10 of r the carrier or support 3, respectively. These clamping members 19 and 20 being of cir- "cular form, enable the spindle head 11 to be oscillated or rotated upon the carrier 3, to

adjust the work or operating member, as

0 the case may be, carriol upon the shaft or spindle into various reljations with the center of oscillation of th carrier or support.

- At the same time the spindle head is longitudinally adjustable within the limits of the 5 slot 16, through which the clamp bolt 17 engages, and is transversely adjustable upon the carrier 3 throughout the length of the transverse slot 10. This enables the work or operating element, whichever may be mounted upon the shaft or spindle, to be adjusted to various positions in relation with the axial center of oscillation of the carrier.

In radius grinding operations the arc of the finished face'will always be concentric 6 with the center of oscillation. For instance,

in Fig. 3 as the carrier is swung to and fro, the engagement of the work 21, carried by the shaft or spindle, with the grinding wheel 22, is such that the periphery of the work 21 will be formed arcuate, concentric with the centerof the pivotal stud 2. At the same time the rotation of the supporting spindle or shaft by means of the drive pulley 13 insures the grinding of this arcuate periphery in circular relation with the axis of rotation of the work and shaft.

In some instances it is desired to grind circular bevels or a straight cylindrical face upon the work, under which conditions the oscillatory carrier 3 is locked in fixed relation with the base 1, and the spindle head adjusted thereon to predetermined relation with the grinding wheel 22. To fixedly hold the carrier or support 3 in relation with the base 1, the upper face of the latter is formed with one or more grooves 23 arranged in radial relation with the center of the stud 2, which is the center of oscillation of the carrier or support. The carrier or support is likewise formed with a similar groove 21 in the bottom face thereof, which groove is arranged medially in alinement with the center of oscillation. When the groove 2st in the bottom of the carrier or support is brought into registry with any one of the grooves 23 in the top face of the base 1, a rectangular locking bar may be inserted longitudinally into the registered grooves, thereby locking the oscillatory carrier in fixed relation with the base.

For work other than circular or rotary work which it is desired to grind or machine concentrically, for instance pieces of irregular or rectangular shape which it may be dcsired to grind or machine to a definite arcuate contour, there is provided an auxiliary carrier 25 adjust-ably mounted upon the main oscillatory carrier 3 to which may be adjustably secured an ordinary machinist's vise, as shown at 26, or any other suitable work holding jig, fixture or appliance. As shown in the drawing the uuxil1ary support comprises a fiat plate adjustably engaged with the main carrier 3 by means of a clamp bolt 27 engaged with the tapered .1 clamp disk.28 located within the transverse beveled slot 10 of the carrier. The auxiliary carrier is shown provided with a T slot 29, in which engage the attachment bolts 30 for holding the vise, jig or other work holding device. It will be understood that theauxiliary base 25 is adjustable in relation with the main carrier or support 3. while the vise 26 is further adjustable upon the auxiliary support, the range of adjustment being such that the work held by the vise or other appliance which may be substituted therefor, may be readily adjusted to any desired relation with the center of oscillation of the carrier or support 3. By 130 may Ell]

the oscillation of the carrieror support? work may be ground or machined to any radius or degree of curvature concentric with the center of oscillation of the carrier.

l/Vhilev the construction has been herein described mainly as a holder for work for grinding operations, it is to be understood that in lieu of the grinding wheel 22, a milling cutter may be employed or any other operative implement. Likewise, While under usual or any ordinary conditions the work to be operated upon will be mounted either upon the shaft or spindle if circular grinding is to be achieved, or held in the vise or other work holding appliance, it is to be also understood that for certain classes of work the grinding wheel 22 may be mounted upon the shaft or spindle and the work to be operated upon may beheld stationary. In such instance the grinding wheel is of course rotated and while being rotated is oscillated to and fro in engagement with the work, just as in the former described arrangement, the work 21 is rotated and is oscillated to and fro while being rotated in engagement with wheel 22. a

It will be noted that by the construction herein described, particularly that shown in the rotary grinding Figs. 1 and 3, both circle grinding andra til Gil

dius grinding may be accomplished simultaneously and that the construction is further capable of performing either circle grinding or radius grinding independently. The wide range of adjustment of the parts en ables the work operated upon to be set in various relations with the center of oscilla tion of the carrier whereby a great variety of operations may be performed and various arcuate forms or contours effected.

From the above description it will be ape parent that there is thus provided a device of the character described, possessing the particular, features of advantage before enumerated as desirable, but which obviously, is susceptible of modification in its form, proportlons, detail construction or arrangement of parts without departing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute, the invention has been described in language more or less specific as to structural fea tures, it is to be understood that the invention is not limited to the specific details shown, but that the means and construction herein disclosed comprise but one of several,

modes of putting the invention into effect, and the invention is therefore claimed in any of its forms or modifications within the legitimate and valid scope of the appended claims,

. be var d Havingthus described my invention, 1,

(3lttll1'1-I: a y i 1 1. In arclevice of the character described, a pivoted CitIIlBI", a revoluble .eplndle, a

bearing head for said spindle eccentrically plvoted upon the PIVOtLGClCLIIIQI, and means i for securing said 1 bearing head in various angular relations with the radius of oscil latory movement of the pivoted carrier, whereby said spindle ISHCttllSBd ito move'in 1 an) arcuate path concentric with the pivotal connection of "thc carrier upon the, oscillation of the carrier independent of the rotation of the spindle.

2. In a device of the character described, the combination with an operating device, of an oscillatory carrier the pivot of which is adapted to be adjustably secured in fixed relation with the operating device, a revoluble spindle, a bearing head for the spindle adjustably secured to the carrier in fixed re lation with thepivotal center of the carrier, said revoluble spindle being movable through an arcuate path in relation with the operating device by the oscillation of the carrier simultaneous with the rotation of the spindle.

3. In a device of the character described,

the combination with an operating device of an oscillatory carrler, the pivot of which is holder adjustably mounted upon the carrier for universal shifting movement in a plane parallel with the oscillatory movement of the carrier, and means for securing the work holder in adjusted fixed relation, with the pivotal center thereof, said work holder being" movable through an arcuate path in relation with the oper:utinpdevice by the oscillation of the c: rrier.

4t. lln a device ot the character described, an oscillatory carrier, a pivotal connection about which the barrier is movable, a revolu-' ble spindle, a baa, .iur head for the spindle mounted upon the wt Hr, a pivotal connection. between. the tltlliltll. and bearing head, said pivotal connection bein r slidable in relation with the carrier in a direction transverse to the radius thereof and slidafblc in relation with the bearing; head in a die rection substantially parallel with the arts of the spindle.

5. In a device of the character described, an oscillatorycarrier, a pivotal connection about which the carrier is movable, a worlt, holder mounted upon said, carrier, and a pivotal connection between the carrier and worlr holder, said pivotal connection bein r slidihgly adjustable in relation with one-of said men hers whereby the worlr. holder may in relation with the center of oscilhtimi of the carrier,

6. .ln ado he of the character described, a pivottfi barrier, a revoluble spindle, a

Ml fl l it bearing head for the spindle both pivotally and slidingly connected with the carrier, said spindle *being capable of movement in an arcuate path in unison with the carrier and concentric with the pivotal connection thereof independent of its rotation.

'7. In a device-of the character described, a pivoted support and a supported member one of said members having therein an undercut V slot, a conical disk, the angle of which substantially agrees with the taper of the slot slidingly positioned therein, and

a clamp stud connecting the other member with said conical disk, whereby said members may be clamped in any position of relative sliding or rotary adjustment in relation one With the other.

In testimony whereof I have hereunto setmy hand this 5th day of July A. D. 1919.

Witnesses:

JOHN DINEEN, F. L. WALKER. 

